1016 EXPEEIMENT STATION BECORD. 



1 per cent foriualin solution, which is made by diluting 10 cc. uf commercial formalin 

 with 400 cc. of water. The flask is then stoppered and set aside for 10 minutes, with 

 occasional shaking. The excess of potassium permanganate is then eliminated by 

 the addition of one-tenth normal hydrogen perf)xid solution. 



With the author's work, 1 cc. of potassium permanganate solution determined 

 iodometrically contained 0.0072601 gm. KI\In(),=0.001723 gm. H.COH; 21.175 cc. 

 hydrogen jieroxid equal 10 cc. potassium i)ermanganate sf)lution. 



Progress in the analysis of butter, margarin, cooking fats, and oils, A. 

 Hasterlik (Oeslcrr. Clinn. Zl;/., ■'> (190,.'), X<>. 7, p}>. 148-152). — A review of recent 

 literature. 



Note on the Beichert value of butter and other fats, E. Reychler {Bid. Soc. 

 Chim. Paris, 3. ser., 25 {1901), pp. U2-1U; <ihs. in Analyst, 26 {1901), No. 300, pp. 

 71, 72). — The author suggests an extension of the Reichert-Meissl method so as to 

 o])tain the amount of volatile insoluble acids. Instead of filtering, he adds 50 cc. 

 alcoliol, and, if necessary, a little ether to the distillate, and titrates the solution in 

 the usual way. The ratio thus obtained between the total volatile acids and the 

 soluble volatile acids varies with different , fats, the difference being especially 

 marked between butter and cocoanut oil. A table of results is shown. 



Determination of cocoanut oil in butter, F. Ranwe/ {Rev. Internal. Falslf., 14 

 {1901), Xu. 4, pp. 89-94; ahs. in Che in. Cmthl., 1901, II, No. 14, pp. 835, 836). — A 

 compilation and test of methods. That of Yandam is recommended. In this the 

 amount of fatty atdd soluble in alcohol of 60° strength is determined and the results 

 expressed in cubic centimeters of deci-normal alkali. 



The anatomy of the fruit of the cocoanut, A. L. AVi.vton {Connecticut Stale, Sta. 

 Rpl. 1901, jit. ..^ ]/j>. 208-225, fi(/s. II). — The morphology and macroscopic structure 

 of the cocoanut are described, and the histological characters of its different parts 

 figured and discu.ssed. Means are suggested for the detection of powdered cocoanut 

 shells in ground spices. Of 147 samples of black pepper examined 21 contained 

 ground cocoanut shells; of 37 samples of cloves 7 were similarly adulterated, and of 

 24 samples of allspice 6 contained cocoanut-shell powder. Radical differences in the 

 composition l)etween cocoanut shells and the spices to which they are added are 

 shown by the analyses of the different materials. 



Detection and approximate estimation of minute quantities of arsenic in 

 beer, bre-wing materials, food stuffs, and fuels {lour. Soc. Chem. In(l.,21 {1902), 

 No. 2, ]>p. 94-96, Jiij. 1). — This is a report of the joint committee of the 8f)ciety of 

 Chemical Industry and of the Society of Public Analysts recommending and 

 descri])ing the Marsli-Berzelius method. 



Methods for the analysis of insecticides and fung-icides, J. K. H.\vwood 

 ( U. S. Dept. Agr., Bureau of Chemistry drc. 10, pp. 8). — Methods are given for the 

 analysis of Paris green, London purple, copper carbonate, potassium cyanid, soap, 

 soda lye, tobacco and tobacco extracts, and formalin. 



Experiments on the separation by means of metallic salts of the albumi- 

 noids produced by digestion, Z. Cerxy {Arcli. I'hysiol. [Pjluger], 87 {1901), No. 

 10-12, pp. 614-633). — LaVioratory work is descriljed in detail. 



The analysis of some new tanning materials, F. A. Block ev {lour. Soc. Chem. 

 Ind, 21 {1902), No. 3, p]>. 1.58-162). 



A method of g'as analysis, A. Sa.mo.jiloff and A. Iudi.n {PJiyHiologisle Russe, 2 

 {1901), No. 31-35, pp. 171-184, fig. 1).—The method described is especially recom- 

 mended for determining carlxni dioxid and oxygen in respired air. 



The sampling and preparation of shoddy, wool dust, and similar materi- 

 als for analysis, L. Meggitt (lour. Soc. Chem. Ind., 21 (1902), No. 2, pp. 105, 

 106). — Directions are given for the preparation ol samples for the determination of 

 nitrogen. 



